1 /* 2 * Copyright (c) 1995, 1996 3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $FreeBSD: src/usr.sbin/rpc.ypxfrd/ypxfrd_server.c,v 1.8.2.1 2002/02/15 00:46:58 des Exp $ 33 * $DragonFly: src/usr.sbin/rpc.ypxfrd/ypxfrd_server.c,v 1.2 2003/06/17 04:30:02 dillon Exp $ 34 */ 35 36 #include "ypxfrd.h" 37 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <unistd.h> 41 #include <string.h> 42 #include <errno.h> 43 #include <sys/types.h> 44 #include <sys/param.h> 45 #include <sys/uio.h> 46 #include <sys/fcntl.h> 47 #include <machine/endian.h> 48 #include "ypxfrd_extern.h" 49 50 int forked = 0; 51 int children = 0; 52 int fp = 0; 53 54 static bool_t 55 xdr_my_xfr(register XDR *xdrs, xfr *objp) 56 { 57 unsigned char buf[XFRBLOCKSIZE]; 58 59 while (1) { 60 if ((objp->xfr_u.xfrblock_buf.xfrblock_buf_len = 61 read(fp, &buf, XFRBLOCKSIZE)) != -1) { 62 objp->ok = TRUE; 63 objp->xfr_u.xfrblock_buf.xfrblock_buf_val = (char *)&buf; 64 } else { 65 objp->ok = FALSE; 66 objp->xfr_u.xfrstat = XFR_READ_ERR; 67 yp_error("read error: %s", strerror(errno)); 68 } 69 70 /* Serialize */ 71 if (!xdr_xfr(xdrs, objp)) 72 return(FALSE); 73 if (objp->ok == FALSE) 74 return(TRUE); 75 if (objp->xfr_u.xfrblock_buf.xfrblock_buf_len < XFRBLOCKSIZE) { 76 objp->ok = FALSE; 77 objp->xfr_u.xfrstat = XFR_DONE; 78 if (!xdr_xfr(xdrs, objp)) 79 return(FALSE); 80 return(TRUE); 81 } 82 } 83 } 84 85 struct xfr * 86 ypxfrd_getmap_1_svc(ypxfr_mapname *argp, struct svc_req *rqstp) 87 { 88 static struct xfr result; 89 char buf[MAXPATHLEN]; 90 91 result.ok = FALSE; 92 result.xfr_u.xfrstat = XFR_DENIED; 93 94 if (yp_validdomain(argp->xfrdomain)) { 95 return(&result); 96 } 97 98 if (yp_access(argp->xfrmap, (struct svc_req *)rqstp)) { 99 return(&result); 100 } 101 102 snprintf (buf, sizeof(buf), "%s/%s/%s", yp_dir, argp->xfrdomain, 103 argp->xfrmap); 104 if (access((char *)&buf, R_OK) == -1) { 105 result.xfr_u.xfrstat = XFR_ACCESS; 106 return(&result); 107 } 108 109 if (argp->xfr_db_type != XFR_DB_BSD_HASH && 110 argp->xfr_db_type != XFR_DB_ANY) { 111 result.xfr_u.xfrstat = XFR_DB_TYPE_MISMATCH; 112 return(&result); 113 } 114 115 #if BYTE_ORDER == LITTLE_ENDIAN 116 if (argp->xfr_byte_order == XFR_ENDIAN_BIG) { 117 #else 118 if (argp->xfr_byte_order == XFR_ENDIAN_LITTLE) { 119 #endif 120 result.xfr_u.xfrstat = XFR_DB_ENDIAN_MISMATCH; 121 return(&result); 122 } 123 124 #ifndef DEBUG 125 if (children < MAX_CHILDREN && fork()) { 126 children++; 127 forked = 0; 128 return (NULL); 129 } else { 130 forked++; 131 } 132 #endif 133 if ((fp = open((char *)&buf, O_RDONLY)) == -1) { 134 result.xfr_u.xfrstat = XFR_READ_ERR; 135 return(&result); 136 } 137 138 /* Start sending the file. */ 139 140 svc_sendreply(rqstp->rq_xprt, xdr_my_xfr, (char *)&result); 141 142 close(fp); 143 144 return (NULL); 145 } 146